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The oldest known _______ are engraved and painted using red ochre and black pigment and show horses, lions, buffalo, mammoth or humans often hunting.
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The oldest known _______ are engraved and painted using red ochre and black pigment and show horses, lions, buffalo, mammoth or humans often hunting.
Hematopoietic cell transplantation can be described according to the relationship between the patient and the donor and by the ________ source of stem cells.